Container closure

Abstract

The present invention relates to a container closure (11) made of plastic for sealing a container, the container closure comprising: a screw cap (13) having a cylindrical outer cover (15) with internal threads (19) and a cover plate (17) connected to the outer cover (15); and an anti-theft ring (25) connected to the free edge (29) of the outer cover (15) via a first pre-set break tab (27) and having an engagement device (35) configured to form-fit into a support in the form of a retaining ring arranged in a region of the container neck (23). The anti-theft ring (25) has cutouts (31) distributed around its entire circumference, the cutouts having an upper edge (33) and a lower edge (35), wherein the upper edge (33) is formed by an arcuate extension of the anti-theft ring (25). The lower edge (35) is formed by a wall section (37) inclined inward in the radial direction. The lower edge (35) of each cut (31) forms a joining device for form-fitting engagement with a support arranged in the area of ​​the container neck (23).

Description

Technical Field

[0001] The present invention relates to a container closure made of plastic as described in the preamble of claim 1, and more particularly to a container, and more particularly to a plastic bottle having a container closure according to the invention as described in the preamble of claim 16. Background Technology

[0002] In the existing technology of plastic sealable caps, most sealable caps are designed with a tamper-evident ring (TAR). This TAR connects to the screw cap using a set break strip arranged along its circumference. The screw cap includes a cylindrical mantel and a cap plate attached to the mantel. The mantel has internal threads, allowing the screw cap to be screwed onto the neck of a container with external threads. The set break strip connects the open edge of the cylindrical mantel to the TAR. If the set break strip breaks, it indicates that the screw cap has been unscrewed from the container at least once.

[0003] In order for the tamper-evident flap to break when the screw cap is unscrewed, the tamper-evident ring must be held axially at the neck of the container so that the axial distance between the tamper-evident ring and the screw cap can increase when unscrewed. Therefore, a retaining device is formed on the inner side of the tamper-evident ring, which engages from below with a retaining ring constructed at the neck of the container and extending outward in the radial direction.

[0004] WO 2005 / 077777 A1 illustrates a commonly used implementation. Here, the tamper-evident tape is implemented such that it is foldable, and the folded portion forms an engagement device that engages below the retaining ring at the container neck. The disadvantages are, on the one hand, that folding is an additional work step, and on the other hand, that the material requirements for the almost doubled implementation of the tamper-evident tape are higher.

[0005] Instead of a folded tamper-evident strip, a known and frequently used variation involves a retaining cam located on the inside of the tamper-evident strip, which acts as a retaining device. WO2009 / 115443 illustrates such a retaining cam. This retaining cam must be implemented in such a way that the closure can be demolded from the mold. This results in the cam being implemented as a bevel or rounded shape in the engagement area. However, this beveled shape disadvantageously results in the cancellation of the form-fit engagement. Therefore, under axial load, the retaining cam can slide across the retaining ring, which hinders the reliable breakage of the set-break tab.

[0006] US 2001 / 0015341A1 discloses several retaining devices configured as lids. The lower edge of the lid is pivotally held in the circumferential direction at an tamper-evident ring by a thin-film hinge. The upper edge is open, thus forming a retaining edge. The retaining edge engages the retaining ring from below the neck of the container. A disadvantage of this prior art is that it can only be manufactured using complex molding dies with multiple sliders, and the strip cannot reliably remain in its position under the axial load caused by unscrewing the screw cap (in which the strip engages the retaining ring from below) and will yield. Summary of the Invention

[0007] Purpose of the invention

[0008] This objective arises from the shortcomings of the prior art described herein, by creating a plastic closure cap whose retaining device remains engaged below the retaining ring even under increased axial load, thereby reliably preventing the anti-theft ring from crossing the retaining ring.

[0009] In addition, the applied force on the closure should be reduced, meaning that the closure should be able to be pressed onto the container with a lower force after the initial filling of the container.

[0010] Another objective is to demonstrate a closed section in which material consumption is reduced, resulting in a corresponding cost reduction.

[0011] illustrate

[0012] In the container closure made of plastic, the stated objective is achieved by the features listed in the characterizing portion of claim 1. Improvements and / or advantageous variations are the subject of the dependent claims.

[0013] Preferably, the invention is characterized in that the tamper-evident ring has circumferentially distributed slits, each slit having an upper edge and a lower edge, wherein the upper edge is formed by an arcuate extension of the tamper-evident ring and the lower edge is formed by radially inwardly inclined wall sections, and the lower edge of each slit forms a fitting device for form-fitting into a support arranged in the region of the container neck. Because the fitting device in the form of an inwardly inclined wall section is not circumferentially present at the tamper-evident ring, and because of the additional slits, the forming of the slits further reduces material usage, thus significantly reducing the material requirement for plastic by up to 5%. Furthermore, the wall sections are immovable radially inward, thereby holding the tamper-evident ring at a retaining ring, and it can only be pulled over the retaining ring when the tamper-evident ring is stretched circumferentially. The tamper-evident ring is thus fixedly held at the retaining ring by the wall sections such that the first pre-set fracture tab is safely torn before overcoming the holding of the wall sections. However, the wall section is flexible or movable radially outward. This allows for demolding of the wall section from the injection mold or die with relatively small force. For the same reason, the force applied to press the container closure is significantly reduced compared to existing technologies. During demolding and pressing, the extension of the tamper-evident ring, which could lead to permanent damage to the container closure, is largely prevented.

[0014] In a particularly preferred embodiment of the invention, the wall section has a first sub-section corresponding to the inclined outer cover section and two second sub-sections connecting the first sub-section to the outer cover. The second sub-sections hold the first sub-section in place and prevent the first sub-section from being pulled inward in the radial direction by an axial unscrewing force. If the wall section is pressed radially outward during pressing or demolding, the second sub-sections will yield in a defined manner because they can be deformed or pressed together.

[0015] Suitablely, the second sub-segments are oriented with their faces tilted inwards towards each other. Thus, if the wall segment is pressed outwards in the radial direction, the second sub-segment can be deformed in a defined manner in the circumferential direction. This deformation is elastic, and the wall segment automatically returns to its basic position, in which it is hooked below the retaining ring.

[0016] It has proven advantageous that the lower edge corresponds to the free edges of the first and second sub-segments and lies in a plane. Thus, the lower edge has a spatial extension and is not merely a straight or linear extension. This ensures that the shape-fitting engagement at the retaining ring is particularly stable and will not loosen due to common axial opening forces.

[0017] In another preferred embodiment of the invention, the plane containing the lower edge is oriented perpendicular to the central axis of the container closure. Thus, if the tamper-evident ring is pulled upwards when the screw cap is unscrewed, the entire lower edge can rest against the retaining ring. This embodiment therefore results in a particularly stable shape fit between the wall section and the retaining ring.

[0018] It has been proven advantageous that the inclined wall sections have a reduced wall thickness relative to the remaining portion of the tamper-evident ring, with the area at the lower edge having the smallest wall thickness. This wall thickness design improves the desired radially outward elastic deformability of the wall sections, thereby further improving the pressability and demolding properties of the container closure.

[0019] In another preferred embodiment of the invention, the wall thickness of the inclined wall section decreases axially from the free end of the tamper ring. Preferably, the wall thickness decreases linearly. As explained in the previous paragraph, this improves the desired radially outward elastic deformation of the wall section. In particular, the region where the lower edge protrudes radially inward the furthest can be elastically deformed outward with particularly good results using the minimum wall thickness.

[0020] In another preferred embodiment of the invention, there are at least two slits that are diametrically opposed to each other. This allows the anti-theft ring to be symmetrically held at the retaining ring.

[0021] Suitablely, multiple identical slits are arranged at equal intervals within the circumferential sections of the tamper-evident ring, and the same number of slits are arranged in circumferential sections that are diametrically opposed. Increasing the number of slits increases the retaining force and makes this retaining force compatible with the force acting on the wall sections when unscrewing. The diametrical arrangement of the same number of wall sections distributes the tensile force acting on the tamper-evident ring symmetrically across the wall sections.

[0022] Because the cuts are advantageously of uniform length and have an angle of 15 to 30 degrees, and preferably between 23 and 27 degrees, at the circumference of the tamper-evident ring, the lower edge of the cut has sufficient length for a reliable shape fit at the retaining ring. Wall sections or cuts of this length can be easily manufactured via a slider in an injection mold.

[0023] Preferably, the invention is further characterized in that the container closure has at least one retaining strap having a first end and a second end, as well as a first longitudinal side and a second longitudinal side, wherein the first end is inseparably connected to the free edge of the outer cover, and the second end is inseparably connected to the tamper-evident ring. Thus, the screw cap is held securely at the container or the tamper-evident ring after being unscrewed from the container neck. The combination of the engagement device in the form of a cut or wall section with at least one retaining strap provides an additional advantage: the tamper-evident strap can only be removed from the container neck in case of damage, and the container closure remains connected to the container during disposal.

[0024] In a preferred embodiment of the invention, at least one notch is provided at the anti-theft ring, and the retaining strip is accommodated in the notch. Because of the notch, the retaining strip does not require additional space, and therefore no additional plastic is needed to construct the retaining strip.

[0025] In a particularly preferred embodiment of the invention, the at least one notch is provided at a circumferential or annular section of the tamper-evident ring, which has no cutouts. Thus, the wall section can be ideally combined with at least one retaining band. Because the retaining force of the wall sections is greatly improved compared to prior art coupling devices, these wall sections do not necessarily have to be forcibly shaped around the tamper-evident ring; instead, circumferential sections of the tamper-evident ring without wall sections can also exist. These circumferential sections provide sufficient space for constructing at least one retaining band. This avoids arranging the retaining band above the wall sections, which could inevitably lead to increased height and material consumption.

[0026] It has proven advantageous that the second pre-set rupture tab connects the first longitudinal side of the retaining band to the free edge of the outer casing, and the third pre-set rupture tab connects the second longitudinal side of the retaining band to the tamper-evident ring. The second and third pre-set rupture tabs stabilize the area surrounding the at least one retaining band. Thus, the tamper-evident ring can still press well against the container neck and is not weakened in the area of ​​the retaining band. Furthermore, the undamaged second and third pre-set rupture tabs, together with the undamaged first pre-set rupture tab, indicate the original closed, unopened container closure. At the tamper-evident ring, the combination of the cut or wall section described above with at least one retaining band is ideal. This is because, for the retaining band to function perfectly, it must be torn in a defined manner. The stable fixation of the tamper-evident ring at the retaining ring precisely achieves this defined tearing of the second and third pre-set rupture tabs.

[0027] In a preferred embodiment of the present invention The at least one retaining band has such a length that, in the spiral With the cover unscrewed, the free edge of the outer cover can be locked into one of the slits, and is held in place by at least one of the slits. The cap is held in place by the slits. Therefore, these slits work directly with the retaining strap to hold the screw cap in place at the tamper-evident ring.The advantage of this clamping method is that it is independent of the support ring located at the preform or the container. Because the support ring can be designed variably in terms of diameter and its position at the container neck, clamping below the support ring has the disadvantage that the length of the retaining strap must always be specifically adapted to the design of the support ring. The screw cap can be secured to the container closure itself, regardless of the container, its support ring, and their dimensions.

[0028] In a particularly preferred embodiment of the invention, two retaining straps are provided, the lengths of which are designed such that when the screw cap is unscrewed, the two retaining straps pull the free edge into one of the slits, thereby locking the free edge in the slit. Preferably, the two retaining straps are taut when the screw cap is held in the slit. Thus, the screw cap is held particularly stably and reliably at the tamper-evident ring. After the container is used, the screw cap can be loosened from the tamper-evident ring and screwed back onto the container.

[0029] Suitablely, the outer cover rests against the upper edge of the cut, and the free edge rests against the first sub-segment of the wall section. Thus, the screw cap is held stably and without wobbling at the tamper-evident ring.

[0030] Another aspect of the invention relates to a container, particularly a plastic bottle having a container closure as described above. Advantageously, the lower edge of each cut engages a retaining ring from below for a form-fit engagement. This container closure is suitable for all containers, particularly plastic bottles, that are constructed with retaining rings for form-fit engagement of tamper-evident rings. Therefore, this container closure is applicable to all containers suitable for standard tamper-evident closures with tamper-evident rings. Attached Figure Description

[0031] Further advantages and features will emerge from the following description of two embodiments of the invention with reference to schematic diagrams. The illustrations are shown non-scale:

[0032] Figure 1 : A perspective view from below of the container closure portion with an anti-theft ring in the first embodiment;

[0033] Figure 2 : Through the perspective longitudinal section of the first embodiment;

[0034] Figure 3 : A second perspective view of the first embodiment from an obliquely upward angle;

[0035] Figure 4 : A view of the anti-theft ring according to the first embodiment, the anti-theft ring being placed on the neck of the container;

[0036] Figure 5 : A perspective view from below of the container closure portion with an anti-theft ring in the second embodiment;

[0037] Figure 6 : Through the perspective longitudinal section of the second embodiment;

[0038] Figure 7 : A second perspective view of the second embodiment from an obliquely upward angle;

[0039] Figure 8 : A view of the anti-theft ring according to the second embodiment, which is placed on the neck of the container;

[0040] Figure 9 Another longitudinal section passing through the container closure;

[0041] Figure 10 Detailed view of the inwardly inclined wall section of the anti-theft ring;

[0042] Figure 11 Perspective view of a wall section that slopes inward;

[0043] Figure 12 : A perspective view of the container closure, which has a retaining strap integrated into the tamper-evident ring;

[0044] Figure 13 : A perspective view of the security ring, in which the screw cap is unscrewed from the neck of the container;

[0045] Figure 14 Perspective view of the anti-theft ring;

[0046] Figure 15 : Longitudinal section of the anti-theft ring in the perspective view;

[0047] Figure 16 Detailed view of the inwardly inclined wall section of the security ring, showing the angle of inclination;

[0048] Figure 17 Side view of a container closure with a screw cap, wherein the open edge of the screw cap is locked in one of the notches and held in place by a retaining band; and

[0049] Figure 18 : Perspective view of the container closure, where the screw cap is pulled to the cut by two retaining straps. Detailed Implementation

[0050] exist Figures 1 to 12 A container closure is shown, which is generally indicated by reference numeral 11. Figures 1 to 4 The first embodiment is shown in the figure, and in Figures 5 to 8 A second embodiment is shown. Figures 13 to 16 The anti-theft ring on the container closure is shown separately.

[0051] The container closure 11 has a screw cap 13, which includes a cylindrical outer cover 15 and a cover plate 17 connected to the outer cover 15. A sealing element, such as a sealing ring 18, may be designed on the inner side of the cover plate 17. The outer cover 15 has an internal thread 19, which interacts with the external thread 21 of the container neck 23 of the container 24. Figure 9 The sealing ring 18 works in conjunction with the open edge of the container neck 23. Thus, when the screw cap 13 is screwed onto the container neck 23, the container 24 is sealed shut.

[0052] The container closure 11 has an anti-theft ring 25, which is connected to the free edge 29 of the outer cover 15 via a first pre-set break tab 27. When the screw cap 13 is unscrewed for the first time, the first pre-set break tab 27 breaks, thus directly showing whether the container closure is originally closed.

[0053] The tamper-evident ring 25 has cutouts 31 distributed along its entire circumference. Each cutout 31 has an upper edge 33 and a lower edge 35. The upper edge 33 is formed by an arcuate section of the tamper-evident ring 25. The lower edge 35 corresponds to the free edge of a wall section 37 that slopes inward in the radial direction. The lower edge 35 has a smaller radius than the tamper-evident ring 25 due to the inward slope of the wall section 37, and thus can collide with a support of the container neck 23 when the screw cap 13 is unscrewed from the container neck 23. This support is provided by a retaining ring 39, which is constructed below the external thread 21 at the container neck 23. When the screw cap 13 is unscrewed, the lower edge 35 engages the retaining ring 39 in a form-fitting manner, thereby reliably holding the retaining ring 39 even under high axial forces.

[0054] Each wall segment 37 has a first sub-segment 41 and two second sub-segments 43. The first sub-segment 41 is an inwardly folded outer cover segment and is preferably constructed to be flat. The second sub-segments 43 are attached to the inwardly folded side of the first sub-segment 41 and connect it to the outer cover 15. The second sub-segments 43 may be constructed to be curved or flat and are inclined inward toward each other. The lower edge 35 of the cut 31 corresponds to the free edge of the first sub-segment 41 and the second sub-segment 43 and is located at... Figure 10 and Figure 16In the plane 45 shown. Plane 45 is preferably oriented perpendicular to the central axis 47 of the container closure 11. The described design features of the wall section 37 have the advantage that the wall section 47 can abut against the retaining ring 39 with its entire lower edge 35 and does not yield under upward axial tension. Thus, the anti-theft ring 25 is held in the retaining ring 39 non-releasably or can only be removed from the retaining ring 39 in the event of damage. The first sub-section 41 is prevented from moving inward in the radial direction by providing the second sub-section 43. However, the first sub-section 41 is capable of moving outward in the radial direction. This movement is flexible, and after the wall section 37 is pressed radially outward, the wall section returns to its basic inwardly inclined position. This has the additional advantage that the container closure can be easily demolded and that the container closure can be pressed onto the container neck 23 with very little force. The flexibility of the wall section 37 allows for demolding from the die-casting mold and pressing onto the container neck 23 without the risk of damage to the wall section 37.

[0055] Preferably, the inclined wall section 37 has a reduced wall thickness relative to the remainder of the tamper ring 25. In particular, in Figure 10 The diagram shows that the region of the lower edge 35 has the minimum wall thickness. This further improves the radially outward flexibility of the wall section 37. The wall thickness of the wall section 37 increases linearly downwards from the lower edge 35.

[0056] exist Figure 4 and Figure 8 The diagram shows that wall sections 37 are arranged in pairs, opposite each other in diameter, at anti-theft rings 25.

[0057] Figure 4 It is shown that, preferably, a plurality of identically sized cuts 31 are arranged at equal intervals in the circumferential section of the anti-theft ring 25, and the same number of cuts 31 are arranged in circumferential sections that are diametrically opposed. Thus, the retaining force of the wall section is distributed as evenly as possible around the circumference of the anti-theft ring 25. According to... Figures 1 to 4 In the first embodiment, two free annular sections 49 without the notch 31 are therefore provided. To manufacture the free annular sections 49, it is preferable that the injection mold used to manufacture the container closure 11 has two sliders. The sliders manufacture the notch 31 and the wall section 37.

[0058] Figures 5 to 7 and especially Figure 8 A second embodiment is shown, in which the cuts 31 or wall segments 37 can be evenly distributed on the circumference of the tamper-evident ring. Therefore, the free annular segment 49 is absent in this embodiment. This embodiment is preferably manufactured using an injection mold with four sliders.

[0059] Preferably, the cuts 31 are all of the same length and have an angle 51 preferably of 25 degrees. Thus, the lower edge 35 has sufficient length to reliably and securely fasten the tamper-evident ring 25 to the neck 23 of the container.

[0060] exist Figure 12 One embodiment is shown in which at least one retaining strap 53 is integrated into the tamper-evident ring 25. The retaining strap 53 has a first end and a second end, as well as a first longitudinal side and a second longitudinal side. The first end 55 is fixedly or irreleasably connected to the free edge 29, and the second end 57 is fixedly or irreleasably connected to the tamper-evident ring 25. Through the retaining strap, the screw cap 13 is irretrievably attached to the container neck 23 after initial unscrewing, and therefore the screw cap 13 must be handled together with the container 24.

[0061] Suitablely, a notch 63 is provided in the free-loop section 49. The retaining band 53 is received in the notch 63. The free-loop section 49 provides sufficient space for the retaining band 53 to be integrated into the anti-theft ring 25 without increasing the height of the anti-theft ring or requiring more material. It should be understood that in the case of multiple retaining bands 53, multiple notches 63 are provided to receive them.

[0062] The second pre-break tab 65 connects the first longitudinal side 59 of the retaining strap 53 to the free edge 29 of the outer cover. The third pre-break tab 67 connects the second longitudinal side 59 of the retaining strap 53 to the tamper-evident ring 25. Like the first pre-break tab 27, the undamaged second and third pre-break tabs 65 and 67 demonstrate the original closure of the container closure. Furthermore, the second and third pre-break tabs 65 and 67 are necessary to ensure that the container closure 11 is sufficiently stable to be snapped onto the container closure 11 even when at least one retaining strap 53 is provided.

[0063] exist Figures 13 to 15 The image shows an anti-theft ring 25 without the screw cap 13 according to the first embodiment. Figure 13 In the middle, the screw cap 13 is unscrewed from the neck 23 of the container. Figure 15 and Figure 16 It can be clearly seen that an annular raised portion 69 is designed above the cut 31 at the anti-theft ring 25, and the upper edge 33 is located on the annular raised portion.

[0064] exist Figure 16The first and second tilt angles 71 and 73 are shown in the figure. The first tilt angle 71 describes the inclination of the first sub-segment 41 relative to the plane of the lower edge 45. The first tilt angle 71 has a size between 60 degrees and 80 degrees, and preferably between 65 degrees and 75 degrees. The larger the first tilt angle 71, the better the stability of the wall segment 37 relative to the vertical force or axial tension caused by unscrewing the screw cap 13. However, the first tilt angle 71 should not become too large, because otherwise the retaining ring 39 cannot be adequately engaged from below.

[0065] The second tilt angle 73 describes the inclination of the cut 31 relative to the plane of the lower edge 45. The connecting line 75, representing the inclination of the cut, connects the upper edge 33 and the lower edge 35 in a plane extending through the central axis 47 and the connecting line 75. The second tilt angle 73 is enclosed by the connecting line 75 and the plane 45. The second tilt angle 73 has a value between 30 degrees and 50 degrees, and preferably between 35 degrees and 45 degrees. The larger the second tilt angle 73, the easier it is to demold the container closure 11.

[0066] The wall section 37 achieves the following: even when the screw cap 13 is unscrewed, the increased axial force (which pulls the tamper-evident ring 25 upward) ensures that the tamper-evident ring 25 remains reliably held at the container neck 23. Correspondingly, the break tabs 27, 65, 67 are reliably torn before the tamper-evident ring 25 is pulled past the retaining ring 39. Furthermore, the embodiment of the wall section 37 enables the container closure to be demolded from its mold in a non-destructive manner, and allows the container closure to be pressed onto the container neck 23 with a reduced applied force (compared to the prior art). This is because the wall section 37 is immovable radially inward, but has some radially outward mobility.

[0067] At the anti-theft ring 27, the combination of the cut 31 or wall section 37 with at least one retaining band 53 provides a significant advantage. This is because, for at least one retaining band 53 to function perfectly, it must be torn in a defined manner. The particularly stable fixation of the anti-theft ring 25 at the retaining ring 39 enables the second and third predetermined break tabs 65, 67 to be precisely torn in a defined manner.

[0068] exist Figure 17A variation of how an unscrewed screw cap 13 can be held at the container 24 is shown. In this variation, at least one retaining band 53 has a length such that the free edge 29 can be held in one of the cuts 31. The screw cap 13 is secured after being unscrewed by the dimensional design of the length of the retaining band 53, thus the screw cap does not obstruct the pouring of the filling. Therefore, the cuts 31 and the retaining band 53 work together directly to secure the screw cap 13. Thus, the cuts 31 serve an additional purpose besides reliably holding the tamper-evident ring 25. Since the screw cap 13 can be held at the tamper-evident ring 25, securing it at the support ring 77 formed at the container neck 23 is unnecessary. Therefore, the retaining band 53 need not be adapted in length to different diameters and positions of the support ring 77, but can always have the same length.

[0069] exist Figure 18 Another embodiment is shown, in which the free edge 29 is pulled into the cutout by a first retaining band and a second retaining band 53a, 53b. The retaining bands 53a, 53b are preferably taut so that the screw cap 13 is securely held at the cutout 31. Preferably, the free edge 29 is pulled into the cutout 31 such that the outer cover 15 abuts against the upper edge 33 of the cutout 31, and the free edge 29 abuts against the first sub-segment 41 of the wall section 37. The abutment of the screw cap 13 at the edges and surfaces ideally utilizes the shaping used to securely hold the tamper-evident ring 25 at the container neck 23 to ensure that the screw cap 13 is securely and without wobbling at the tamper-evident ring 25.

[0070] List of reference numerals

[0071] 11 Container Closure Section

[0072] 13 Screw cap

[0073] 15 Cylindrical outer cover

[0074] 17. Cover plate

[0075] 18 Sealing ring

[0076] 19 Internal Thread

[0077] 21 External thread

[0078] 23 Container neck

[0079] 24 Containers

[0080] 25 Anti-theft rings

[0081] 27 First-defined fractured splint

[0082] 29. Free edges of the outer casing

[0083] 31 Incision

[0084] 33. The upper edge of the cut

[0085] 35. Lower edge of the cut, joining device.

[0086] 37 Wall Section

[0087] 39. Clinging ring, support

[0088] 41 First Sub-segment

[0089] 43 Second Sub-segment

[0090] 45. Plane with lower edge

[0091] 47. Central Axis

[0092] 49 Free-circular section

[0093] 51 Zhang Jiao

[0094] 53a, 53b First retaining band and second retaining band

[0095] 55. The first end of the retaining belt

[0096] 57. The second end of the retaining band

[0097] 59. The first longitudinal side of the retaining belt

[0098] 61. Retaining the second longitudinal side of the belt

[0099] 63 Notch

[0100] 65 Second setting fracture plate

[0101] 67 Third setting fracture plate

[0102] 69. Annular ridge

[0103] 71 First Inclination Angle

[0104] 73 Second Inclination Angle

[0105] 75 Connect the straight lines

[0106] 77. Support ring.

Claims

1. A container closure (11) made of plastic for sealing a container (24), the container closure having - A screw cap (13), the screw cap having a cylindrical outer cover (15) with internal threads (19) and a cover plate (17) connected to the outer cover (15), and - Anti-theft ring (25), which is connected to the free edge (29) of the outer cover (15) via a first pre-set break tab (27) and has an engagement device configured to form-fit into a support in the form of a retaining ring (39) arranged in the region of the container neck (23). Its features are, - The anti-theft ring (25) has circumferentially distributed cuts (31), the cuts having an upper edge (33) and a lower edge (35), wherein the upper edge (33) is formed by an arcuate extension of the anti-theft ring (25) and the lower edge (35) is formed by an inwardly inclined wall section (37) in the radial direction, and - The lower edge (35) of each cut (31) forms the engagement device for form-fitting engagement with a support arranged in the region of the container neck (23), and - The wall section (37) has a first sub-section (41) corresponding to the inclined outer cover section and two second sub-sections (43) connecting the first sub-section (41) to the outer cover (15), wherein the first sub-section (41) is constructed to be flat, and - The inclined wall section (37) has a reduced wall thickness relative to the remaining portion of the anti-theft ring (25), wherein the area of ​​the lower edge (35) has the smallest wall thickness.

2. The container closure according to claim 1, characterized in that, The second sub-segment (43) is oriented inwards towards each other.

3. The container closure according to claim 1 or 2, characterized in that, The lower edge (35) corresponds to the free edges of the first sub-segment (41) and the second sub-segment (43) and lies in the plane (45).

4. The container closure according to claim 3, characterized in that, The plane (45) in which the lower edge (35) is located is oriented perpendicular to the central axis (47) of the container closure (11).

5. The container closure according to claim 1 or 2, characterized in that, The wall thickness of the inclined wall section (37) decreases in the axial direction from the free end of the anti-theft ring (25).

6. The container closure according to claim 1 or 2, characterized in that, There are at least two cuts that are opposite each other in diameter (31).

7. The container closure according to claim 1 or 2, characterized in that, In the circumferential section of the anti-theft ring (25), there are multiple cuts (31) of the same size arranged at equal intervals, and in the circumferential sections that are opposite each other in diameter, there are the same number of cuts (31).

8. The container closure according to claim 1 or 2, characterized in that, The cuts (31) are evenly distributed on the circumference of the anti-theft ring (25).

9. The container closure according to claim 1 or 2, characterized in that, The cuts (31) are of the same length and have an angle (51) of 15 to 30 degrees at the circumference of the anti-theft ring (25).

10. The container closure according to claim 1 or 2, characterized in that, The container closure (11) has at least one retaining strap (53) having a first end (55) and a second end (57) as well as a first longitudinal side (59) and a second longitudinal side (61), wherein the first end (55) is inseparably connected to the free edge (29) of the outer cover (15), and the second end (57) is inseparably connected to the anti-theft ring (25).

11. The container closure according to claim 10, characterized in that, The at least one retaining band (53) has such a length that, in the unscrewed state of the screw cap (13), the free edge (29) of the outer cover (15) can be locked in one of the cuts (31) and held in the cut (31) by the at least one retaining band (53).

12. The container closure according to claim 11, characterized in that, Two retaining straps (53) are provided, the lengths of which are designed such that when the screw cap (13) is unscrewed, the two retaining straps pull the free edge (29) into one of the cuts (31), thereby locking the free edge (29) in the cut (31).

13. The container closure according to claim 11 or 12, characterized in that, The outer cover (15) rests against the upper edge (33) of the cut (31), and the free edge (29) rests against the first sub-section (41) of the wall section (37).

14. The container closure according to claim 10, characterized in that, At least one notch (63) is provided at the anti-theft ring (25), and the retaining band (53) is accommodated in the notch.

15. The container closure according to claim 14, characterized in that, The at least one notch (63) is provided at the circumference or annular section (49) of the anti-theft ring (25), the circumference or annular section having no cut (31).

16. The container closure according to claim 10, characterized in that, The second set-break tab (65) connects the first longitudinal side (59) of the retaining strap (53) to the free edge (29) of the outer cover (15), and the third set-break tab (67) connects the second longitudinal side (61) of the retaining strap (53) to the anti-theft ring (25).

17. The container closure according to claim 1 or 2, characterized in that, The cuts (31) are of the same length and have an angle (51) between 23 degrees and 27 degrees at the circumference of the anti-theft ring (25).

18. A container (24) having a container closure (11) according to any one of the preceding claims, wherein, The container (24) has a container neck (23) having an external thread (21) and a retaining ring (39) that projects radially outward below the external thread (21). Its features are, The lower edge (35) of each cut (31) engages the retaining ring (39) from below for a form-fitting engagement.

Images